Boiler



(No Model.)

E. V. HUTGHENS.

` BOILER. No. 350,592. y Patented-001;. 12, 1886. Fiyi; 1

ill nl? F WE ef @Af Attorney 'Witnesse5- UNITED STATES PATENT OFFICE.

ERASMUS V. HUTCHENS, OF EVANSVILLE, INDIANA. i

BOILER.

SPECIFICATION forming part of Letters Patent` No. 350,592, dated October12, 21.886.

Application filed March 6, 1886.

To all whom it may concern:

Be it known that I, ERASMUS V. HUTcHENs, acitizen of the United States,residing atEvansville, in the county of Vander-burg, State of Indiana,have invented a new and useful Improvcment in Boilers, of which thefollowing 1s a specification, reference being had therein to theaccompanying drawings. p

My invention relates to improvements in steam-boilers in which thewater-supply is brought to a thorotiglllydieated condition before itenters the boiler by passing around the fire-box and through a iiattenedspiral coil over the tire, thence into the boiler. The boiler itself isalso to contain tubes of various sizes, thereby affording greaterheating-sur face and a more rapid generation of steam. The exhaust pipealso bears the improvement of discharging directly above the head of theboiler upward against the apex of a cone, thereby distributing theexhaust and causing a more uniform draft. I attain these objects by themechanism illustrated in the accompanying drawings, in which- Figure lis aperspective view with the shell of the boiler broken off, exposingthe various parts. Fig. 2 shows back view of boiler, part iusection.Fig.8 is a horizontal section,reierredto as follows: `A A A is the shellof the boiler. B B is the inner shell of the tire-box, which is dividedinto annular sections 1 2 3 4 by separators C C C. D D is thecrown-sheet of the boiler, from which the tubes extend upward to thehead of the boiler E E, the tubes varying 1n size, as shown. G is theexhaust-pipe; H, the cone to distribute the steam in its upwardtendency. This cone is supported and held in position by braces or staysI l. The water-supply, being taken in at the base of the boiler throughpipe at. J, passes around the boiler to the doors of the tire-box,thence upward inside the jambs of the door, then returning around thefire-box, thence upward to the annular section ,4 at the top of thetrebox, around the same, then downward into the third section, thencearound the fire-box into pipe K, running into the flattened spiral coilL L, ,continuing around in this coil, then pass- S eria1 No. 194,283.(No model.)

ing upward through the pipe M into the boiler. The connections of pipesK and Mare made with unions7 at N N. Ois a hanger with projections P tosustain and hold the spiral in a secure manner, also the support-at S,for the same purpose. The numbero't' these hang ers is not to belimited. They are to bev made hollow and to be filled with water. T arethe grate-bars; U, lthe doors; V, the tubes; V, the smoke stack.

Fig. 2 shows thc back View of the boiler, J being the inlet for thewater, which passes around the boiler, in the direction of the arrows,into the attened spiral at R.

Fig.' 3 is a top view of the boiler; showing the various sizes of thetubes, the large ones to be contained in the outer circle,then de creasein size, toward the center.

I am aware that prior to my invention boilers have been made with atire-box surrounded by water, and with tubes that vary in size, and withau exhaust-pipe 'turning upward. I therefore do not claim such acombination, broadly; but y Vhat I do claim as my invention, and desireto secure by Letters Patent, is

l. ln a steam-boiler, the combination of a water tire-box havingpartitions, whereby the water is-caused to circulate through thesame,with the spiral coils located in the fire box or furnace.

2. In a steam boiler, the combination of a water lire-box havingpartitions, whereby the water is caused to circulate tlu'oughthesame,with the spiral coil located in the fire-box or furnace, and thefire-tubes of different diameter, substantially as shown and described.

3. In a steamrboiler, the combination, with an inverted conc locatedover the tire tubes of the boiler, of au exhaust-pipe discharging thesteam on the apex ofthe cone,whereby a uniform draft is produced,substantially as shown and described.

E. V. HUTCHENS.

